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CVE-2026-66472 – Unauthenticated SQL Injection – Everest Backup WordPress Plugin ≤ 2.3.12

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Summary

CVE-2026-66472 is an unauthenticated SQL Injection vulnerability in the Everest Backup WordPress plugin, affecting all versions up to and including 2.3.12. The flaw allows a remote, unauthenticated attacker to inject arbitrary SQL commands into the plugin’s database queries, and has been assigned a CVSS v3.1 base score of 9.3 (Critical).

Technical details

  • Root cause: The plugin fails to properly neutralize special characters supplied in user input before using it in SQL statements (CWE-89: Improper Neutralization of Special Elements used in an SQL Command).
  • Trigger conditions: No authentication or user interaction is required to exploit the flaw; the vulnerable input is reachable over the network.
  • Attack vector: Network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N).
  • Impact: Scope is changed (S:C), with high confidentiality impact — attackers can directly interact with the site’s database, including extracting sensitive stored data — and low availability impact.

Affected software

  • Everest Backup WordPress plugin (by Everestthemes) — all versions up to and including 2.3.12

Severity

  • CVSS v3.1 Base Score: 9.3 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L

Mitigation and recommended actions

  • Immediate: No official vendor patch was available for this vulnerability as of the latest public reporting. Site owners should check for a plugin update beyond version 2.3.12 and apply it as soon as it is released.
  • If no patch is available: Consider deactivating the Everest Backup plugin until a fix is released, restrict access to the affected functionality at the network/WAF level, and monitor database and web server logs for anomalous or injection-pattern requests targeting the plugin’s endpoints.

References

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